cxVideoImplService.cpp

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/*=========================================================================
This file is part of CustusX, an Image Guided Therapy Application.

Copyright (c) 2008-2014, SINTEF Department of Medical Technology
All rights reserved.

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modification, are permitted provided that the following conditions are met:

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   this list of conditions and the following disclaimer.

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   and/or other materials provided with the distribution.

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   may be used to endorse or promote products derived from this software 
   without specific prior written permission.

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#include "cxVideoImplService.h"

#include <ctkPluginContext.h>
#include "boost/bind.hpp"
#include "cxData.h"

#include "cxRegistrationTransform.h"

#include "cxPlaybackUSAcquisitionVideo.h"
#include "cxVideoConnection.h"
#include "cxBasicVideoSource.h"
#include "cxTypeConversions.h"
#include "cxTrackingService.h"
#include "cxVideoServiceBackend.h"

#include "cxLogger.h"
#include "cxTrackingServiceProxy.h"
#include "cxPatientModelServiceProxy.h"
#include "cxSpaceProviderImpl.h"
#include "cxVideoServiceBackend.h"
#include "cxStreamerService.h"
#include "cxStreamerServiceProxy.h"
#include "cxStreamerServiceNull.h"
#include "cxNullDeleter.h"

namespace cx
{

VideoImplService::VideoImplService(ctkPluginContext *context) :
    mContext(context )
{
        VideoServiceBackendPtr videoBackend;

        PatientModelServicePtr pasm = PatientModelServiceProxy::create(context);
        TrackingServicePtr tracking = TrackingServiceProxy::create(context);
        SpaceProviderPtr spaceProvider;
        spaceProvider.reset(new cx::SpaceProviderImpl(tracking, pasm));
        mBackend = VideoServiceBackend::create(pasm,tracking, spaceProvider, context);

        mEmptyVideoSource.reset(new BasicVideoSource());
        mVideoConnection.reset(new VideoConnection(mBackend));
        mActiveVideoSource = mEmptyVideoSource;
        mUSAcquisitionVideoPlayback.reset(new USAcquisitionVideoPlayback(mBackend));

        connect(mVideoConnection.get(), &VideoConnection::connected, this, &VideoImplService::autoSelectActiveVideoSource);
        connect(mVideoConnection.get(), &VideoConnection::videoSourcesChanged, this, &VideoImplService::autoSelectActiveVideoSource);
        connect(mVideoConnection.get(), &VideoConnection::fps, this, &VideoImplService::fpsSlot);
        connect(mBackend->getToolManager().get(), &TrackingService::activeToolChanged, this, &VideoImplService::autoSelectActiveVideoSource);
        connect(mVideoConnection.get(), &VideoConnection::connected, this, &VideoImplService::connected);

        this->initServiceListener();
}

VideoImplService::~VideoImplService()
{
        // Disconnect before deleting videoconnection:
        // The VideoConnection might emit events AND call processevents, causing
        // recursive calls back to this during deletion.
        disconnect(mVideoConnection.get(), &VideoConnection::connected, this, &VideoImplService::autoSelectActiveVideoSource);
        disconnect(mVideoConnection.get(), &VideoConnection::videoSourcesChanged, this, &VideoImplService::autoSelectActiveVideoSource);
        disconnect(mVideoConnection.get(), &VideoConnection::fps, this, &VideoImplService::fpsSlot);
        disconnect(mBackend->getToolManager().get(), &TrackingService::activeToolChanged, this, &VideoImplService::autoSelectActiveVideoSource);
        disconnect(mVideoConnection.get(), &VideoConnection::connected, this, &VideoImplService::connected);

        mVideoConnection.reset();
}

StreamerServicePtr VideoImplService::getStreamerService(QString uid)
{
    QList<StreamerServicePtr> services = this->getStreamerServices();
    foreach(StreamerServicePtr service, services)
    {
        if (service->getType()==uid)
        {
            return service;
        }
    }
    return StreamerServicePtr(new StreamerServiceNull, null_deleter());
}

QList<StreamerServicePtr> VideoImplService::getStreamerServices()
{
    QList<StreamerServicePtr> retval;
    QList<StreamerService *> services = mStreamerServiceListener->getServices();
    foreach(StreamerService* service, services)
    {
        if(service)
        {
            StreamerServicePtr temp(new StreamerServiceProxy(mBackend->mContext, service->getName()), null_deleter());
            retval.append(temp);
        }
    }
    return retval;
}

bool VideoImplService::isNull()
{
        return false;
}

void VideoImplService::autoSelectActiveVideoSource()
{
        VideoSourcePtr suggestion = this->getGuessForActiveVideoSource(mActiveVideoSource);
        this->setActiveVideoSource(suggestion->getUid());
}

void VideoImplService::setActiveVideoSource(QString uid)
{
        mActiveVideoSource = mEmptyVideoSource;

        std::vector<VideoSourcePtr> sources = this->getVideoSources();
        for (unsigned i=0; i<sources.size(); ++i)
                if (sources[i]->getUid()==uid)
                        mActiveVideoSource = sources[i];

        // set active stream in all probes if stream is present:
        TrackingService::ToolMap tools = mBackend->getToolManager()->getTools();
        for (TrackingService::ToolMap::iterator iter=tools.begin(); iter!=tools.end(); ++iter)
        {
                ProbePtr probe = iter->second->getProbe();
                if (!probe)
                        continue;
                if (!probe->getAvailableVideoSources().count(uid))
                        continue;
                probe->setActiveStream(uid);
        }

        emit activeVideoSourceChanged();
}

VideoSourcePtr VideoImplService::getGuessForActiveVideoSource(VideoSourcePtr old)
{
        // ask for playback stream:
        if (mUSAcquisitionVideoPlayback->isActive())
                return mUSAcquisitionVideoPlayback->getVideoSource();

        // ask for active stream in first probe:
        ToolPtr tool = mBackend->getToolManager()->getFirstProbe();
        if (tool && tool->getProbe() && tool->getProbe()->getRTSource())
        {
                // keep existing if present
                if (old)
                {
                        if (tool->getProbe()->getAvailableVideoSources().count(old->getUid()))
                                        return old;
                }

                return tool->getProbe()->getRTSource();
        }

        // ask for anything
        std::vector<VideoSourcePtr> allSources = this->getVideoSources();
        // keep existing if present
        if (old)
        {
                if (std::count(allSources.begin(), allSources.end(), old))
                                return old;
        }
        if (!allSources.empty())
                return allSources.front();

        // give up: return empty
        return mEmptyVideoSource;
}

VideoSourcePtr VideoImplService::getActiveVideoSource()
{
        return mActiveVideoSource;
}

void VideoImplService::setPlaybackMode(PlaybackTimePtr controller)
{
        mUSAcquisitionVideoPlayback->setTime(controller);
        this->autoSelectActiveVideoSource();

        VideoSourcePtr playbackSource = mUSAcquisitionVideoPlayback->getVideoSource();
        TrackingService::ToolMap tools = mBackend->getToolManager()->getTools();
        for (TrackingService::ToolMap::iterator iter=tools.begin(); iter!=tools.end(); ++iter)
        {
                ProbePtr probe = iter->second->getProbe();
                if (!probe)
                        continue;
                if (mUSAcquisitionVideoPlayback->isActive())
                        probe->setRTSource(playbackSource);
                else
                        probe->removeRTSource(playbackSource);
        }
        if (mUSAcquisitionVideoPlayback->isActive())
                this->setActiveVideoSource(playbackSource->getUid());
        else
                this->autoSelectActiveVideoSource();

        mUSAcquisitionVideoPlayback->setRoot(mBackend->getDataManager()->getActivePatientFolder() + "/US_Acq/");
}

std::vector<VideoSourcePtr> VideoImplService::getVideoSources()
{
        std::vector<VideoSourcePtr> retval = mVideoConnection->getVideoSources();
        if (mUSAcquisitionVideoPlayback->isActive())
                retval.push_back(mUSAcquisitionVideoPlayback->getVideoSource());
        return retval;
}

void VideoImplService::fpsSlot(QString source, int val)
{
        if (source==mActiveVideoSource->getUid())
                emit fps(val);
}

void VideoImplService::openConnection()
{
        if (mVideoConnection->isConnected())
                return;

    //StreamerService* service = this->getStreamerService(mConnectionMethod);
    StreamerServicePtr service = this->getStreamerService(mConnectionMethod);
        if (!service)
        {
                reportError(QString("Found no streamer for method [%1]").arg(mConnectionMethod));
                return;
        }

        mVideoConnection->runDirectLinkClient(service);
}

void VideoImplService::closeConnection()
{
        mVideoConnection->disconnectServer();
}

bool VideoImplService::isConnected() const
{
        return mVideoConnection->isConnected();
}

QString VideoImplService::getConnectionMethod()
{
        return mConnectionMethod;
}

void VideoImplService::setConnectionMethod(QString connectionMethod)
{
        if (mConnectionMethod == connectionMethod)
                return;

        if(connectionMethod.isEmpty())
        {
                reportWarning("Trying to set connection method to empty string");
                return;
        }

        mConnectionMethod = connectionMethod;
//      emit connectionMethodChanged();
}

std::vector<TimelineEvent> VideoImplService::getPlaybackEvents()
{
        return mUSAcquisitionVideoPlayback->getEvents();
}

void VideoImplService::initServiceListener()
{
        mStreamerServiceListener.reset(new ServiceTrackerListener<StreamerService>(
                                                           mBackend->mContext,
                                                           boost::bind(&VideoImplService::onStreamerServiceAdded, this, _1),
                                                           boost::function<void (StreamerService*)>(),
                                                           boost::bind(&VideoImplService::onStreamerServiceRemoved, this, _1)
                                                           ));
        mStreamerServiceListener->open();

}

void VideoImplService::onStreamerServiceAdded(StreamerService* service)
{
        if (mConnectionMethod.isEmpty())
                mConnectionMethod = service->getType();

        emit StreamerServiceAdded(service);
}

void VideoImplService::onStreamerServiceRemoved(StreamerService *service)
{
        emit StreamerServiceRemoved(service);
}


} /* namespace cx */